How to use Web api for controllers and MVC for view (Front-end)?

Hello, my problem is the following, I'm doing a test for stage and the guy asked to do an ASP.NET project with mvc only for views, and web api just for controllers and another layer for the bank only that I I could not do the mvc recognize the controllers in the api web, they are different projects, they are 3 projects in the same solution, could anyone help me? Thank you